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Another idea could be the random metronome battle in which are choosen only the pokemon that learn metronome(togepi,clefable,clefairy,ecc...) and they can use only it.This kind of battle isn't new but still isn't on PS.
I know it is difficult to do but would be good introduce OU random battle where are taken only the pokemons of this tier so people mustn't prepare a team but only play.In my opinion this is a good idea for all.
I' m sorry because if you want latias 5 ivs I wrong infact she come from PM and not NB.Me too know that sometime NB isn't sure but latias come from PM and this italian forum is good almost as smogon.